Great work all in all, amending the card's all curable deficiencies.Of course, one still needs to keep a real sb pro around to cover all shareware game bases, adpcm issuesuntil a perfect sb pro clone is born from scratch - which I think will never happen.

The mixer works the right way, meaning in Wolfenstein 3D the stereo is correct, or simply lowering the Left channel to zero results in sound only from the Right channel.It is only the High-Speed DMA mode which is the Stereo mode of the SBPro is reversed, just like it was on the real SBPro.I believe most games that use the SBPro Stereo mode already taken this abnormality into account.

In Duke Nukem 3D setup the Stereo will be automatically reversed if you select the SBPro and you don't need to enable "Reverse Stereo" switch.This can be tested in DOSBox, where the SBPro Stereo mode is NOT reversed like the real hardware.

I've tried Duke3D and Tie Fighter where the stereo already compensated for the real SBPro, but I had to switch "Reverse Stereo" in DOSBox.Descent is not compensated, I had to reverse to sound correct with the YMF.

I never got this whole 'reverse stereo' thing... I got an SB Pro 2.0 when they were brand new, and I never had to use the 'reverse stereo' option in any games, nor did I ever suffer from the channels being reversed in any software.Does it only happen on some SB Pro cards? Or is it related to the rest of the system somehow? That it happens with some motherboards/chipsets/CPUs/whatever, but not with others?

Scali wrote:I got an SB Pro 2.0 when they were brand new, and I never had to use the 'reverse stereo' option in any games,

If I think about it, there is nothing wrong with the SBPro Stereo sound at all.Most games that designed for SBPro Stereo mode simply play correctly WITHOUT having to engage the Reverse switch.Where the notion that the SBPro Stereo is reversed came from, beats me...

Can someone please test Duke Nukem 3D SETUP with a real CT1600 SBPro2.0 if it is reversed or not with the Reverse switch turned OFF.

Just wanted to chime in and say what an awesome thread. Using the info in this thread i set up my YMF719/YMF704C card to sound really good, primarily eliminating the bit of noise i was experiencing. I was also originally using the speaker-out where the noise was coming from, switched to line out and it sounds so much better now. My card doesn't seem to have any jumpers on for SPK/LINE.

Really need to test some games on it now, the only game i've been testing was Doom and Doom2. They 719/704C should be a really great combo.

Scali wrote:I never got this whole 'reverse stereo' thing... I got an SB Pro 2.0 when they were brand new, and I never had to use the 'reverse stereo' option in any games, nor did I ever suffer from the channels being reversed in any software.Does it only happen on some SB Pro cards? Or is it related to the rest of the system somehow? That it happens with some motherboards/chipsets/CPUs/whatever, but not with others?

I have no idea why these two cards would exhibit this behaviour, because my Sound Galaxy Basic 16 (I38-MMSN810), which uses the same chipset as the Sound Galaxy NX Pro, does not exhibit the reverse stereo effect.This happens in games like Star Wars X-Wing and even in demos like Future Crew's Panic (you can clearly hear it in the intro sequence).

Scali wrote:I never got this whole 'reverse stereo' thing... I got an SB Pro 2.0 when they were brand new, and I never had to use the 'reverse stereo' option in any games, nor did I ever suffer from the channels being reversed in any software.Does it only happen on some SB Pro cards? Or is it related to the rest of the system somehow? That it happens with some motherboards/chipsets/CPUs/whatever, but not with others?

That's what I thought too. Some findings to the contrary in the earlier thread: viewtopic.php?f=46&t=46201#p468321I've never noticed an issue with stereo, but still didn't get around to really testing for it specifically.

The Yamaha YMF71x is a clear winner in all aspects.Noise: Very silent.MPU-401+Wavetable: Bug free, Noise free.Mixer: Functional with a nice GUI.PnP: Easily set with a nice GUI.PCM/Voice: After the capacitor modification the cleanest and most artifact free sound card I've heard in DOS.OPL: Authentic OPL3.

Ironically it was my first sound card for my Pentium build, which is my only retro build...

Its funny when i was looking for an ISA sound card for my system I was hell bent on getting an AWE64 gold not knowing much about sound cards. I managed to pick up a normal AWE64 and as much as it's a good card, my Sonata 3D card (which is got for £2.99!) with both the YMF719-S and YMF704C OPL4 chip on board is the one that's installed permanently in my machine . Following the advice regarding the mixer settings in the gui and using the correct output it is such a great sounding card. Having the flexibility of authentic OPL3 and wavetable OPL4 sound in one card is awesome.

squareguy wrote:OKDuke 3D 1.4 Atomic under sound test with real CT1600 and SBPro 2.0 selected in setup and reverse not checked the sound test plays left and right correctly

Thank you, This is also true with the YMF71x.

jesolo wrote: even in demos like Future Crew's Panic (you can clearly hear it in the intro sequence).

Sounds correct with YMF71x, but reversed in DSOBox.DOSBox "fixed" the reversed stereo "issue" when it did not need to be fixed.

firage wrote:That's what I thought too. Some findings to the contrary in the earlier thread: viewtopic.php?f=46&t=46201#p468321I've never noticed an issue with stereo, but still didn't get around to really testing for it specifically.

CD, FM, Voice... all the sources were reversed? His cable was reversed.To me it seems that SBPro2.0 has everything alright, no need to switch cables or reverse stereo.

One thing is wrong with the YMF71x, the Wavetable analog audio is actually reversed.EDIT: I've checked the PCB and Datasheet and indeed, the traces from the wavetable go into the wrong inputs on the YMF chip.It's MOD time..

The Audician 32 has the Wavetable audio return reversed in the PCB itself where the Left channel from the wavetable header goes into AUX2R on the YMF71x chip and vice versa.Since it is an easy fix I decided to take things into my own hands.

By no means my prettiest job for the lack of proper green trace fix wire, but it is functional and durable.The channels in the Mixer did not change, only the input from the wavetable.The first guitar in Doom E1L1 is on the right channel now, as it should.Side note: The Left channel of the CD cable is the WHITE wire, it goes to pin 1 as marked on the PCB.